36 results about "Contact microphone" patented technology

Directional piezoelectric devices and methods for their manufacture are provided that improve the quality of piezoelectric device mediated signal detection and provide new thermal imaging devices. The devices can provide over an order of magnitude improved signal to noise ratio compared with previously known devices. The devices may be used along with new head mounted acoustic technologies for improved voice communication systems in inherently noisy environments. The head mounted technologies utilize microphones that are activated by pressure wherein the applied trigger pressure further serves to improve efficiency of the microphones. Also provided are head pieces that include both microphones and speakers that are particularly useful for harsh environments such as those encountered by fire fighters. The head pieces are capable of further functions related to contact with the head of the user, such as reporting physiological variables of the user, along with oral communications.

A method is provided for analyzing respiration of a subject (20). Using a non-contact microphone (22), a raw signal indicative of airflow sounds of the respiration is generated. The raw signal is analyzed to determine a first set of one or more parameters of the respiration. An algorithm is applied to the first set of parameters to derive a second set of one or more estimated parameters of the respiration that are not generally directly measurable in the raw signal. Other embodiments are also described.

A method and a wearable communication system for personal face-to-face and wireless communications in high noise environments are provided. A noise cancellation device (NCD) operably coupled to a wireless coupling device (WCD) includes a speech acquisition unit, an audio signal processing unit, one or more loudspeakers, and a communication module. The NCD receives voice vibrations from user speech via a contact microphone and a second microphone and converts the voice vibrations into an audio signal. The NCD processes the audio signal to remove noise signals and enhance a speech signal contained in the audio signal. A loudspeaker emits the speech signal during face-to-face communication. The NCD transmits the speech signal to a communication device via the WCD and receives an external speech signal from the communication device during wireless communication. With the NCD, the signal intelligibility and signal-to-noise ratio can be improved, for example, from −10 dB to 20 dB.

The present invention discloses an electronic stethoscope with a Piezo-Electrical Film contact microphone comprising a stethoscope head with a Piezo-Electrical Film contact microphone inside, and the stethoscope head is electrically connected to a circuit and a microcontroller unit (MCU). The microcontroller unit is connected to a front-end operational amplifier (OP-amp) circuit, a wave filter circuit, and a transmit circuit, such that when the stethoscope is used, the weak sound signal received by contacting stethoscope head with a human body is sent to the OP amplifier. The amplified sound signal (such as heart sound and lung sound) selectively measured by the switch module is processed by the microcontroller unit and the wave filter. The filtered sound signal is sent to a transmit / receive circuit, so that the wave filter circuit can filter the noise of the sound signal produced by human bodies under the control of the microcontroller unit, and medical people can make correct diagnostics based on the correct sound received through the transmit / receive circuits.

A three-dimensional (3D) sound gaming application can include an ultrasonic sound system, one or more gamers, a gaming console and a throat microphone set. The ultrasonic sound system can include a digital signal processing (DSP) that can adjust the phase, delay, reverb, echo, gain, magnitude or other audio signal component of an audio signal or audio signal components received from the gaming console; an amplifier which can amplify the processed audio signal; and a pair of emitters which can emit ultrasonic signals to each of the gamer's ears to produce a 3D sound effect. The throat microphone set can include a throat microphone which can integrate a low pass filter to attenuate any picked up, ultrasonic carrier frequency signals from the emitted ultrasonic waves. In addition, the throat microphone set can also include an ear speaker piece with one or more apertures for allowing sound produced by ultrasonic waves to enter the gamer's ear canal.

A method is provided for analyzing respiration of a subject (20). Using a non-contact microphone (22), a raw signal indicative of airflow sounds of the respiration is generated. The raw signal is analyzed to determine a first set of one or more parameters of the respiration. An algorithm is applied to the first set of parameters to derive a second set of one or more estimated parameters of the respiration that are not generally directly measurable in the raw signal. Other embodiments are also described.

The present invention describes a contact type electronic stethoscope with a noise interference resisting function for auscultation, and the stethoscope includes a chest piece for contacting a patient's body, a contact type microphone installed in the chest piece for receiving sounds of patient's organs, and an elastic member disposed on an external side of the contact type microphone, so that harsh sounds and irrelevant noises produced by rubbing the surface of clothes with the patient's body can be avoided during an auscultation, if the piece chest is pressed and contacted with the patient's body without reaching a predetermined pressure and maintains a predetermined distance from the patient's body.

A skin-contact microphone device is provided herein, which at least contains a linear body having appropriate plasticity and flexibility, and a voice collection element configured at an end of the linear body. The linear body is structured into a three-dimensional shape which, when viewed from the top, has a curved shape like the letter ‘C’ and, when viewed from a side, has a shape like the symbol ‘<’ as the two ends of the linear body are bended upward and downward for an appropriate angle respectively. With this three-dimensional structure, the microphone device is able to have its voice collection element stably and reliably positioned at its best location, which is close to the jaw around the top of a user's throat by having its the other end supported by the muscle around the user's clavicle.

A noise reduction pickup relates to the technical field of pickup technique, solving the technical problem of reducing background noise. The pickup is characterized by comprising a contact microphone, an inner shell and an outer shell. The outer shell is provided with a closed top and an opened bottom, and is in a bowl-shaped whole structure. The inner shell is arranged in the outer shell, the end surface of the inner shell protrudes from the opening at the bottom of the outer shell to the outside of the opening, and the axial distance between the inner wall of the top of the outer shell and the end surface of the top of the inner shell is larger than the axial distance between the bottom border of the outer shell and the end surface of the bottom of the inner shell. The side of the inner shell is provided with at least two flexible cantilevers in axial symmetry, and the flexible cantilevers are connected with the outer shell. The contact microphone is arranged in the inner shell. The noise reduction pickup of the invention can effectively reduce the background noise.

Secure testing system including a frame having a lens portion and a support portion extending rearward therefrom, a housing attached to the frame, and an assembly arranged in the housing. The assembly includes a display oriented rearward, an optional (but preferred) contact microphone that operatively contacts a face of a wearer and detects vibrations of a bone of the wearer, a biometric sensor arranged at least partly in the housing, and a processor that monitors the contact microphone for vibrations and the biometric sensor for changes in biometric data. For testing, the processor directs display of questions on the display, receives answers via a user interface, confirms identity of a test-taker by analyzing biometric data and detects talking by the test-taker indicative of cheating on the test by monitoring vibrations detected by the contact microphone.

A method and a wearable communication system for personal face-to-face and wireless communications in high noise environments are provided. A noise cancellation device (NCD) operably coupled to a wireless coupling device (WCD) includes a speech acquisition unit, an audio signal processing unit, one or more loudspeakers, and a communication module. The NCD receives voice vibrations from user speech via a contact microphone and a second microphone and converts the voice vibrations into an audio signal. The NCD processes the audio signal to remove noise signals and enhance a speech signal contained in the audio signal. A loudspeaker emits the speech signal during face-to-face communication. The NCD transmits the speech signal to a communication device via the WCD and receives an external speech signal from the communication device during wireless communication. With the NCD, the signal intelligibility and signal-to-noise ratio can be improved, for example, from −10 dB to 20 dB.

The invention relates to a head-mounted voice transceiver, and relates to the technical field of voice transceivers, which solves the technical problems of poor call quality and uncomfortable wearing during the driving of motorcycles in the prior art. The voice transceiver is characterized by comprising a helmet, a contact microphone component, an interconnecting piece, a speaker and a deconcentrator, wherein the contact microphone component is arranged at an afterbrain position or a cheekbone position on the inner side of the helmet through the interconnecting piece, a contact surface of the contact microphone component faces an inner cavity of the helmet and can move elastically relative to the inner wall of the helmet; the speaker is arranged at an ear position of the inner side of the helmet; the deconcentrator is arranged on the helmet, and is connected with the contact microphone component and the speaker through a cable; and the deconcentrator is provided with a lead-out cable for connecting communication equipment. When the voice transceiver provided by the invention is utilized, the clear speech communication can be kept during the driving of motorcycles, and the head-mounted voice transceiver wears comfortable.

The invention discloses an earplug type bone conduction call transmitting and receiving device, which is characterized by comprising a call transmitting earplug device, a call receiving earplug device, a signal processing circuit and a connector, wherein the call transmitting earplug device comprises a first shell and a miniature contact microphone transmitter arranged in the first shell; the call receiving earplug device comprises a second shell and a miniature moving coil receiver arranged in the second shell; the miniature contact microphone transmitter is connected with the signal processing circuit which is connected with the connector; the miniature moving coil receiver is connected with the connector; and the output end of the signal processing circuit is provided with PTT switches in parallel for the make-and-break switch in the process of communication. The earplug type bone conduction call transmitting and receiving device has the advantages that the microphone transmitter and the receiver are completely separated from each other to achieve the call transmitting and the call receiving respectively through the miniature contact microphone transmitter and the miniature moving coil receiver by two ears of a person, so that the problems of self excitation and audio mixing in a duplex state are solved fundamentally, and the earplug type bone conduction call transmitting and receiving device can be applied to the field of communication devices such as mobile phone and interphone, and has a broad market prospect.

The embodiments of the invention disclose a speech wake-up method and system, electronic equipment and a computer readable storage medium, and relates to the technical field of intelligent equipment. The method includes the steps that if the speech activity detection process detects that a speech signal collected by a microphone conforms to a first preset condition, a processor is triggered to read a data signal collected by a gravity sensor; according to the data signal, whether the speech signal is generated by speaking of a user wearing the electronic equipment or not is judged; if not, the speech signal is ignored; or if yes, the keyword recognition process is started, and if the speech signal is recognized to contain a preset speech instruction keyword, the electronic equipment is controlled to perform the corresponding function. According to the embodiments, energy consumption of the electronic equipment can be saved, the electronic equipment can be avoided being woken up by mistake; and in addition, no special bone-conduction microphone or other contact microphone is required, the cost is low, an algorithm is simple and practical, the accuracy is high, and consumed resources are few.

The present invention relates to one kind of contacting electronic stethoscope capable of avoiding noise interference. The contacting electronic stethoscope has stethoscopy head in the part to be contacted with human body, and inside the stethoscopy head, there are one contacting microphone to receive the sound from human organ and one elastomer outside the contacting microphone to keep the contacting microphone in certain distance from the human body before some pressure is applied to the stethoscopy head so as to avoid friction sound while the stethoscopy head is moved on the surface of human body or clothing.

A percussion instrument includes a drum shell, a batter head maintained under tension by a rim secured to the top of the drum shell, a flexible member supported at the bottom end of the drum shell, a contact microphone retained on a central section of the flexible member, an acoustic transmission structure in contact with the batter head, and a drive foot coupled to a lower end of the acoustic transmission structure. The contact microphone can be coupled to the flexible support member with a first double-sided adhesive tape member. A foam cushion disposed between the drive foot and the contact microphone can be coupled to the drive foot on a top side with a second double-sided adhesive tape member and on the opposite bottom side with a third double-sided adhesive member to reduce unwanted microphonics or feedback, and allow rapid reversion of the signal from the contact microphone.

Metallic structures having acoustic-based tamper detection sensors are disclosed. The acoustic-based tamper detection sensors may have contact microphones in direct contact with the metallic structures. Upon detection of tamper based on acoustic signals, the tamper detection sensors may broadcast a tamper warning signal or data and / or store the tamper warning data in a memory.

A percussion instrument includes a drum shell, a batter head maintained under tension by a rim secured to the top of the drum shell, a flexible member supported at the bottom end of the drum shell, a contact microphone retained on a central section of the flexible member, an acoustic transmission structure in contact with the batter head, and a drive foot coupled to a lower end of the acoustic transmission structure. The contact microphone can be coupled to the flexible support member with a first double-sided adhesive tape member. A foam cushion disposed between the drive foot and the contact microphone can be coupled to the drive foot on a top side with a second double-sided adhesive tape member and on the opposite bottom side with a third double-sided adhesive member to reduce unwanted microphonics or feedback, and allow rapid reversion of the signal from the contact microphone.

An electro-mechanical musical instrument capable of generating a whole or partial instrument resonant frequency, said instrument comprising a body (1) having a first end (2) and a second end (3), a soundboard (4) positioned between said first and second ends adapted to generate a live frequency response and a contact microphone or sensor (5) adapted to receive said resonant frequency wherein said body includes a rigid member (6) positioned between said first and second ends of said body, said rigid member being adapted to apply tension or compression between said first and second ends of said body and simultaneously contact said soundboard between said first and second body ends such that said application of tension or compression adjusts or modifies said resonant frequency of said instrument.

An electro-mechanical musical instrument capable of generating a whole or partial instrument resonant frequency, said instrument comprising a body (1) having a first end (2) and a second end (3), a soundboard (4) positioned between said first and second ends adapted to generate a live frequency response and a contact microphone or sensor (5) adapted to receive said resonant frequency wherein said body includes a rigid member (6) positioned between said first and second ends of said body, said rigid member being adapted to apply tension or compression between said first and second ends of said body and simultaneously contact said soundboard between said first and second body ends such that said application of tension or compression adjusts or modifies said resonant frequency of said instrument.

The invention provides an electret piezoelectric cable and applications thereof. The electret piezoelectric cable comprises a first electrode core, a piezoelectric electret layer, a polymer insulation layer, a second layer electrode layer and a shielding layer which are successively coaxially arranged. The invention also provides the applications of the piezoelectric cable in a traffic shaft sensor, a piezoelectric cable switch and a contact microphone. The electret piezoelectric cable has the advantages of high piezoelectric signals, higher voltage response sensitivity, high mechanical strength, and good linearity output.

A portable device, and related method, that allows the values of one or more parameters characterising the operation of a mechanical watch to be measured. The device is provided with a contact microphone including a contact piece and a piezoelectric element. The contact piece is brought into physical contact with the case of a watch during a measurement period. The device further includes a power source, such as a rechargeable or replaceable battery, a microprocessor, a memory, and a screen for displaying the values measured, preferably a touch-sensitive screen. Preferably, the dimensions of the device are of a same order of magnitude as the case of a wristwatch. The device may have the shape of a horological eyeglass.

A system and method for determining the respiratory and other physiological status of a patient. Here, an oscillometric device is mounted on a patient's limb, and oscillometric pulse waveforms are obtained as the device's cuff deflates, thus obtaining pulse wave signals and artifact signals over multiple patient breaths. A computer processor analyzes these signals, and removes artifacts according to various algorithms. The resulting signal can be viewed as containing both an amplitude modulated envelope of pulse waves (AM signals) and a frequency modulated sequence of pulses at various time intervals (FM signals). The main harmonics of the AM and FM signals contain respiratory status data, and the system analyzes both signals. Breathing depth and even pain data may also be obtained by this method. Artifacts caused by aberrant breathing can be distinguished using non-contact microphones and suitable algorithms. The final respiratory status data is output or stored in memory.

The invention relates to a contact microphone device, which at least comprises one plastic / elastic linear element and a sound receiver at one end of linear element, wherein the linear element is three dimensional; at downward view, it is in C shape; at side view, two ends of linear element are bended upwards and downwards to form < shape; therefore, the linear element can surround the user neck, while its one end is support by the neck bottom, and another end with sound receiver can be fixed near the jaw of user.

A percussion instrument includes a drum shell, a batter head maintained under tension by a rim secured to the top of the drum shell, a flexible member supported at the bottom end of the drum shell, a contact microphone retained on a central section of the flexible member, an acoustic transmission structure in contact with the batter head, and a drive foot coupled to a lower end of the acoustic transmission structure. The contact microphone can be coupled to the flexible support member with a first double-sided adhesive tape member. A foam cushion disposed between the drive foot and the contact microphone can be coupled to the drive foot on a top side with a second double-sided adhesive tape member and on the opposite bottom side with a third double-sided adhesive member to reduce unwanted microphonics or feedback, and allow rapid reversion of the signal from the contact microphone.

A cylindrical contact-type microphone relates to the technical field of audio devices, and solves the technical problem of inconvenient assembly of an existing contact-type microphone. The microphone comprises a shell, and a circuit board (4), a piezoelectric ceramic sheet (2), a lower-stage connection plate (3) and a conductive polar ring (5) which are mounted within the shell, wherein the shell is a two-section cylindrical conductive cylinder body, and a negative signal lower connection sheet of the lower-stage connection plate (3) is electrically connected to a step (13) at a joint portion of an upper cylinder section (11) and a lower cylinder section (12) of the shell.

The invention provides a contact microphone, which includes a shell, a circuit board, a support block placed inside the shell, two sets of suspension parts, a reverse induction coil assembly and a magnet. The reverse induction coil assembly includes a reverse winding and is connected to The upper coil and the lower coil together, the magnet is fixedly installed in the casing through the support block, and the two sets of suspension parts are sleeved on the support block, symmetrically arranged at the upper and lower ends of the magnet. The suspension includes an inner fixing ring, an outer fixing ring and a connecting body. Two sets of suspension parts with the same stiffness coefficient are symmetrically arranged, and the air conduction noise forces they bear cancel each other out, which significantly improves the noise resistance of the product; Through the up and down vibration of the induction coil assembly reversely wound, the two poles of the magnet are synchronously cut to obtain two positively superimposed motional electromotive force outputs, and the conversion of the vibration signal to the electrical signal is completed, which greatly improves the sensitivity of the product; two groups The suspension and reverse induction coil assembly form an elastic bladder structure that provides high frequency resonance.

A cylindrical contact-type microphone relates to the technical field of audio devices, and solves the technical problem of inconvenient assembly of an existing contact-type microphone. The microphone comprises a shell, and a circuit board (4), a piezoelectric ceramic sheet (2), a lower-stage connection plate (3) and a conductive polar ring (5) which are mounted within the shell, wherein the shell is a two-section cylindrical conductive cylinder body, and a negative signal lower connection sheet of the lower-stage connection plate (3) is electrically connected to a step (13) at a joint portion of an upper cylinder section (11) and a lower cylinder section (12) of the shell.